Floating ice are seen from China's icebreaker Xuelong, or "Snow Dragon", when the ice breaker crossing the region of Prydz Bay, Antarctica, Dec. 2, 2013. [Photo/Xinhua]

Floating ice are seen from China's icebreaker Xuelong, or "Snow Dragon", when the ice breaker crossing the region of Prydz Bay, Antarctica, Dec. 2, 2013. [Photo/Xinhua] 

Floating ice are seen from China's icebreaker Xuelong, or "Snow Dragon", when the ice breaker crossing the region of Prydz Bay, Antarctica, Dec. 2, 2013. [Photo/Xinhua] 

Floating ice are seen from China's icebreaker Xuelong, or "Snow Dragon", when the ice breaker crossing the region of Prydz Bay, Antarctica, Dec. 2, 2013. [Photo/Xinhua] 

Floating ice are seen from China's icebreaker Xuelong, or "Snow Dragon", when the ice breaker crossing the region of Prydz Bay, Antarctica, Dec. 2, 2013. [Photo/Xinhua]